Question

Find the HCF of the following by prime factorization method
160, 220, 390
(2) 57, 114,76
[2x2​

Answer 1

$160 = 2 \times 2 \times 2 \times 2 \times 2 \times 5 \\ 220 = 2 \times 2 \times 5 \times 11 \\ 390 = 2 \times 3 \times 5 \times 13$

$hcf = 2 \times 5 = 10$